Brings the scrollable columns into the enterprise release

[rauhryan]

• Various css fixes specific to safari issues in the milestone layout #312
• Chains the card extension to fix failed payload merges #311
• Make the columns scrollable with horizontal scroll on the milestones view #280
• Consistent Word Break Handling #240
• Accommodates custom media types #306
• Adds a composable client-side parser in prep for Card Relationships #302
• Prevents QP's from polluting others with matching name #316
• Adds deployed boilerplate for PR timelines #320

[dahlbyk]

Consistent Word Break Handling #240

For the record, this has been in enterprise for quite a while.

[rauhryan]

Yeah, I thought so too, it showed up in the diff somehow.